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/* Copyright 2016 Alex 'AdUser' Z (ad_user@runbox.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef F2B_FILTER_H_
#define F2B_FILTER_H_
#include "config.h"
#include "log.h"
/**
* @file
* This header describes filter module definition and related routines
*/
/** filter module definition */
typedef struct f2b_filter_t {
void *h; /**< dlopen handler */
void *cfg; /**< opaque pointer of module config */
char file[PATH_MAX]; /**< path to file with patterns */
/* handlers */
/** dlsym pointer to handler of @a create command */
void *(*create) (const char *id);
/** dlsym pointer to handler of @a config command */
bool (*config) (void *cfg, const char *key, const char *value);
/** dlsym pointer to handler of @a append command */
bool (*append) (void *cfg, const char *pattern);
/** dlsym pointer to handler of @a logcb command */
void (*logcb) (void *cfg, void (*cb)(log_msgtype_t lvl, const char *msg));
/** dlsym pointer to handler of @a ready command */
bool (*ready) (void *cfg);
/** dlsym pointer to handler of @a flush command */
bool (*flush) (void *cfg);
/** dlsym pointer to handler of @a stats command */
bool (*stats) (void *cfg, char *buf, size_t bufsize);
/** dlsym pointer to handler of @a match command */
bool (*match) (void *cfg, const char *line, char *buf, size_t buf_size);
/** dlsym pointer to handler of @a destroy command */
void (*destroy) (void *cfg);
} f2b_filter_t;
/**
* @brief Create module from config
* @param config Pointer to config section with module description
* @param id Filter id
* @returns Pointer to allocated module struct or NULL on error
*/
f2b_filter_t * f2b_filter_create (f2b_config_section_t *config, const char *id);
/**
* @brief Free module metadata
* @param f Pointer to module struct
*/
void f2b_filter_destroy (f2b_filter_t *f);
/**
* @brief Append pattern to filter
* @param f Pointer to filter struct
* @param pattern Match pattern
* @returns true on success, false on error
*/
bool f2b_filter_append(f2b_filter_t *f, const char *pattern);
/**
* @brief Match a line against given filter
* @param f Pointer to filter struct
* @param line Line of data
* @param buf Match buffer
* @param bufsize Size of match buffer
* @returns false if no match and true otherwise with filling @a buf with matched token
*/
bool f2b_filter_match (f2b_filter_t *f, const char *line, char *buf, size_t bufsize);
/* handlers for csocket commands processing */
/** handler of 'jail $JAIL filter reload' cmd */
void f2b_filter_cmd_reload(char *buf, size_t bufsize, f2b_filter_t *f);
/** handler of 'jail $JAIL filter stats' cmd */
void f2b_filter_cmd_stats (char *buf, size_t bufsize, f2b_filter_t *f);
#endif /* F2B_FILTER_H_ */